Celestia is Chris Laurel to OpenGL development of 3D astronomy software. Users are free to roam in the table based on Hipparcos simulate the universe, and no speed, direction, time constraints, and by a small satellite viewing angle, large variety of objects to the galaxy.

NASA and ESA have used Celestia in education and promotion programs, and as an orbital analysis software interface

You can use our Online App Box and run Celestia on any O.S.. for example: Mac, Windows, Android, iPhone, iPad...

Celestia is released under the GNU General Public License free software, there are Microsoft Windows, Mac OS X and Linux versions you need to download the software, the use of our product Online App Box, you can use Celestia on any platform, and handheld devices.

Based on Hipparcos table, Celestia comes with nearly 120,000 stars. Adjustable maximum visibility of the apparent magnitude to change the number of stars on the screen can also change the appearance of the star exhibit. Celestia use very precise theoretical calculations VSOP87 tracks, including binary stars, planets, extrasolar planets, dwarf planets, moons, asteroids, comets, satellites and spacecraft, but also provides various planets, moons eclipse, eclipse predictions.

You can use simple keyboard, mouse command at any speed, arrived within seconds Celestia universe anywhere, including the globular clusters, nebulae, irregular, elliptical or spiral galaxies (comes with more than 10,000 galaxies), or you can journey the field is set to forward, backward, or in any direction. Can surround objects, and celestial synchronous operation, or tracking celestial bodies and the lock on the screen.

1. When you first run the software, it will pop up a message (shared folder message), just click OK button. The software will add a virtual disk on your hard drive, allowing you to upload or download data, specify: This method is completely safe

for example, my virtual disk:

2. Then, the software will remind you need to register an account

3. When you have successfully registered, you can begin to use the online app box on any platform